What is a search engine? Google search engine

Have you ever wondered what a search enginesystem? When you go online, read news or go to the post office, you use the services of a browser installed on your personal computer. However, he does not search the Internet by himself, but with the help of special search engines.

Definition

So what is a search engine in terms ofsystem administrator? In general terms, it is a system designed to find information. More formal terms are a software and hardware complex designed to search data on the Internet. There are enough interfaces for this purpose for every taste. Usually, the user chooses the most convenient interface and uses it all his life.

The search engine itself consists ofa search robot that searches for information on sites; indexer, which provides the fastest search and output of the most qualitative result; and a graphical user interface for the user. Consider some popular information systems and their interfaces.

Search engine

As a graphical user interface,browsers provide user interaction with search engines. The very first browser with which any user acquires a self-bought computer is Internet Explorer. However, usually on it no one is delayed for a long time, as very often in his work there are failures, delays in processing information, and search results do not always satisfy the interests of the user. Therefore, people usually start using search engines with a more convenient interface.

If you want to change the browser, be sure toconsider the use of FireFox. Convenient and fast in the work, it rarely changes to other interfaces. Appeared in 2004, the freely available browser quickly gained popularity, but it does not compare with Google, which produces a browser and its own search engine. The only advantage is that on FireFox rarely anyone writes viruses.

The leader among browsers is rightfully considered to besearch engine Google. The most convenient interface, its own built-in search engine and user-friendly interface allow you to win the heart of the consumer from the first minute of work in this browser.

For mobile devices, the best choice isOpera or OperaMini. The convenience of working with bookmarks allows the user to work much faster in this browser on the phone than with any other interface.

IPS

Before starting to consider searchsystems on the Internet, let's understand the concept of what an information retrieval system is. In general, this system can be called any application or interface, which gives the user the result of searching in information storage systems and databases. There are 2 types of IPS.

1. Documentographic. Search in these systems is not based on the information itself, but on special indexed codes like libraries, when they first look at the card of the book, and only then the book is found on it.
2. Factographic. Here, the search is performed in the same way, not on a specific file, but on any facts about it.

Leader

When talking about information systems, you can notmention the leader among them. This is without a doubt the Google search engine. According to 2014, more than 68% of users prefer to use this particular search engine. Based on the indexing of pages, this search engine contains more than 60 trillion documents.

The history of "Google" began in 1996 inStanford University as a training project of Larry Page and Sergey Brin. Their system is based on the method of OCD, the so-called method of transparent management, which became the basis for the company's development for many years.

What is "Google" in terms of conventionaluser? It's convenient, and most importantly - a clean interface, without a heap of advertising on the main search page. The system of accounts, which allows you to store data about the pages viewed, and bookmarks in the virtual space, and it does not matter which device you came from. After "Google" bought the company Android, through the system of accounts it became possible to combine all of their devices in a single network.

"Yandex"

And how in Russia answer the question, what issearch system? In our country, the development of Internet technologies also did not stand still. This can be seen and the development of users of a variety of browsers. So what is the search engine "Yandex"? In Russia, there is a search engine with a lot of integrated functions, such as an Internet wallet (by the way, not supported by most popular online stores and services), quite good card service, though not comparable to Google. There is even an application that should show traffic jams, but, as often happens, a good idea turned into a farce, as information about traffic jams has been updated for too long.

In addition to everything, the main search window is stuffed with news, weather and other gadgets, absolutely not necessary for a person who went to the Internet to find, for example, his favorite song.

Caution, the virus

It would seem, what harm can the search enginesystem? However, there is one IRS, which is nothing more than a pest. It's called Webalta. Here are some of its features, and you already decide what the Webalta search engine is.

Its main feature is that it does notasks permission to install from the user. If the browser and the search for "Amigo" often comes with downloaded applications from the Internet, and during installation you can simply remove the check mark (the main thing is to notice that you are offered to install not what you downloaded), then this system itself is prescribed as the start page in your browser. And removing it from there is a problem even for advanced users.

What is the Webalta homepage? This is a lot of "useful" news, worthy of the first pages of the yellow press - all the "true" stories from the world of stars and the like. Advertising on Webalta also deserves a separate mention. Every possible means for losing weight, swapping muscles and men's health, cures for all diseases, an increase in the female breast is undoubtedly a useful reference for every person. Do not click on these links. You can easily catch the virus. And if you are lucky to avoid this, and you manage to order any "drugs and preparations," then be ready to say goodbye to your health.